Chad Pregracke

Founder of Living Lands & Waters, CNN's Hero of the Year for 2013, Environmental Speaker & Bestselling Author

Ron Sims

Former Deputy Secretary for the US Department of Housing and Urban Development

Britta Riley

Founder of Windowfarms.org

Andrew Hoffman

Holcim (US) Professor of Sustainable Enterprise at the University of Michigan

Michael Lombardi

Diving Scientist, Technologist & Environmentalist

Harvey Wasserman

Journalist, Author, Democracy Activist & Advocate for Renewable Energy

Naomi Oreskes

Geologist & Earth Science Historian

Carl Pope

Senior Advisor to UN Envoy for Cities and Climate; Former CEO and Chairman of the Sierra Club

Monica Pedersen

Designer; Host on HGTV's "Designed To Sell" & "Bang For Your Buck"

Sy Montgomery

Naturalist, Adventurer & Author of "The Good Good Pig" & "The Soul of an Octopus"

Secrets of the Octopus

Mark Tercek

Former President & CEO of The Nature Conservancy

Jae Rhim Lee

Artist and TED Fellow Jae Rhim Lee Re-Imagines the Relationships Between the Body and the World

Carl Safina

Ecologist & Writer

Laura Stachel, M.D., M.P.H

Co-Founder of WE CARE Solar, a Company that Fights to Combat High Maternal Mortality Rates in Developing Countries

Ric O'Barry

Wildlife Activist, Author & Founder of the Dolphin Project; Star of the Academy Award-Winning Documentary "The Cove"

Louie Psihoyos

Photographer & Documentary Film Director Known for the Academy Award-Winning Documentary "The Cove"

Jonathan Trent

Former Director of Offshore Membrane Enclosures for Growing Algae; Founder of UpCycle Systems

Keith Colburn

Safety & Sustainable Fisheries Advocate; Captain of The Wizard on Discovery Channel's "Deadliest Catch"

Laurie David

Producer, Activist Author,The Family Dinner: Great Ways To Connect With Your Kids One Meal At A Time

Joan Baez

Legendary Folk Musician & Human Rights Activist